I know that this is probably a dumb question, but can Portable VirtualBox be autostarted, like when you insert the USB drive into a port? Can this be done, or is there a plan to add this as a feature someday?
Well, if you mean to autostart Virt.Box FROM USB-Stick, that's possible.
Like with any other program via "autorun.inf". Just place a file named "autorun.inf" in the root of the USB-(or other)-Device. It must contain the following code: